通过不同配风方式研究层燃炉非阻力型正压的机理  

Study on the Mechanism of Non-resistance Puffs in Stoker Fired Furnaces by Applying Different Ways of Air Distributions

作　　者：季俊杰[1] 罗永浩[1] 胡元[1] 

机构地区：[1]上海交通大学热能工程研究所,上海200240

出　　处：《动力工程》2007年第2期194-198,共5页Power Engineering

摘　　要：为揭示层燃炉非阻力型正压的机理,建立了实验台,利用天然气模拟层燃炉内挥发分的燃烧。采用动态压力传感器测量了炉内的压力波动。研究了2种不同配风方式在不同流量下的压力波动幅值,结合数值模拟对这2种配风方式下炉内气相燃烧特征进行了比较分析。结果表明:配风对非阻力型正压有显著影响,这种现象可用“涡脱落诱导微爆燃”的非阻力型正压解释。An experimental test rig, which uses natural gas as a substitute of volatiles for simulating combustion in stoker furnaces, has been set up to study the formation mechanism of non-resistance puffs. A dynamic pressure transducer was used to measure pressure oscillations within the furnace. Oscillation amplitudes for two different air distribution modes various air flow conditions are compared and the respective gas combustion characteristics analyzed with the help of numerical simulation. According to test and simulation results, the reason why air distribution modes have a great effect on the formation of non-resistance puff is being revealed, and for the first time the formation mechanism of non-resistance puffs to be called ＂vortex shedding induced tiny deflagration＂, presented, Figs 8, table 1 and refs 6

关 键 词：动力机械工程 层燃炉 非阻力型 正压 压力波动 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程] TK224.1